Engine block



Nov- 1, 1932- A. M. TEVIS ET AL 1,885,566

ENGINE BLOCK Filed June 4. 1951 2 Sheets-Sheet 1 v H M gwvemtozs v H. M. 721 1 6 flu/ Z5 21? Nov. 1, 1932.

A. M. TEVIS ET AL ENGINE BLOCK Filed June 4, 1931 2 Sheets-Sheet 2 Patented Nov. 1, 1932 UNITED STATES PATENT OFFICE ANTHONY M. TEVIS AND LOUIS M. SUTTER, OF EUREKA, CALIFORNIA ENGINE BLOCK Application filed. June 4, 1981, 7 Serial No. 542,148.

This invention relates to engine blocks and particularly to the rear portion of the block which houses the clutch, the fly Wheel and the pinion of the Bendix drive.

. The general object is to provide an 1mproved form of housing for the clutch, fly wheel and pinion which is cast in one piece and as a separate unit from the body of the engine block whereby this housin may be readily removed or slid longitudinally on the transmission shaft to permit the initial installation of the clutch and fly wheel or permit the repair or replacement of these parts.

A further object is to so construct this housing that the clutch and the shaft section upon which the clutch is mounted may be bodily removed without having to take down the engine.

Another object is to provide a housing of this character having means for supporting and embracing the projecting portion of the clutch pedal shaft which projects out of the housing.

7 Other objects will appear in the courseof the following description.

Our invention is illustrated in the accompanying drawings, wherein Figure 1 is a side elevation of the rear end of an engine block showing the clutch hous- 0 ing of our invention;

Figure 2 is a vertical longitudinal section of the housing shown in Figure 1;

Figure 3 is a section on the line 33 of Figure 1;

Figure 4c is a section on the line H of Figure 2;

Referring to these drawings, A generally designates the engine block having theusual upper section 10 of the crank case and a lower section 11. The ends of these crank case sections are formed with the flange 12. The shaft of the usual Bendix drive is designated 13. Forming part of the upper crank case section is a transverse supporting brace'14; which supports the rear bearing 15 for the crank shaft. These parts have nothing to do with our present invention but we have thought it best to describe the parts so as to show the manner in which the improved housof the Bendix drive which ing or rear section of the engine block coacts with this forward portion.

' The clutch and fly wheel housing is designated generally 16. The forward portion of this housing is circular in cross section to house the fly wheel and is flanged at 17 ,this flange abutting against the flange 12 of the forward portion of the engine block to which it isbolted by bolts 18. Rearward of the cylindrical portion 19 of the housing the housing is contracted in diameter.

v The upper wall of the housing is down Wardly and rearwardly inclined at 20 and supports the detachable cover 21. The upper wall of the housing then extends rearward at 22 and is transversely flat as shown in Figure 4:. The lower and side wall of the housing is inwardly curved at 23 and then is extended longitudinally rearward as shown in Figure 4 so that the extreme rear end of the housing defines a rectangular chamber having a transversely curved lower wall 23. The rear end of the housing has a rear wall 24 and is provided with a bearing hub 25 defining the opening through which the transmission shaft passes. The lateral walls of the housing rearward of the cylindrical portion 19 are provided with lateral bearings 26 through which the clutch shaft is normally disposed. On the exterior of the housing, there is mounted 8i an upwardlyand outwardly extending brace 27 having a bearing 28, at its upper end, constituting a bearing for the outer end of the clutch pedal shaft and this shaft is further supported by a brace 29 which is bolted to the flange 17 as shown in Figure 1.

The wall of the cylindrical portion 19, as shown most clearly in Figures 1 and 3, is formed with an outwardly protuberant portion 30 which is offset from the cylindrical portion 19 and extends forward thereof as shown in Figure 1 and is providedwith a flange 31. This portion 30 houses the pinion engages the fly wheel carried within the cylindrical portion 19 as usual.

a It will be seen from this construction that there is nobearing for the clutch shaft within the housing or carried thereby except the bearing 25, this clutchshaft extending into 10 a recess in the extremity of the engine shaft and being supported at its forward ends therein.

The clutch is mounted upon this longitudinally extending clutch shaft (not shown) and this clutch is operated by means of a transverse clutch pedal shaft which extends through the bearing 26. The particular construction of the clutch and allied parts does not constitute part of this invention and is, therefore, not illustrated.

The shaft 13 of the Bendix drive, of course, extends into the chamber 30 and this shaft carries upon it the pinion which engages the Bendix drive and obviously-the clutch and fly wheel housing may be withdrawn rearwardly off of this pinion or pushed on to the pinion. The rear end of the housing is formed just below the bearing 25'with an opening 32 which is screw-threaded for the reception of the screw holding the rear end of the housing to a chassis brace.

It will be seen that this housing is very simple, that it is readily assembledand as readily taken down. In most of the clutch housings in use today, the-differential must be disengagedv in order to make repairs on the clutch. This is not necessary with the present clutch housing. Furthermore, this clutch housing avoids vibration. This clutch housing makes it very easy to gain access to the inner part of the fly wheel and permits the making of adjustments very quickly. Furthermore the fly wheel can be removed and worked on without taking the motor out of the chassis.

With this construction furthermore, the clutch itself will be moved out with the clutch housing and does not have to be taken down nor does the clutch have to be removed when relining the clutch.

We c1aiin:-

The combination with an engine block having an annular flange at its rear end, of a clutchand fly wheel housing having an annular flange at its inner end removably bolted to the first named flange, the housing being formed to provide a cylindrical portion for enclosing the fly wheel, and rearward of this cylindrical portion the housing having a downwardly and rearwardly inclined upper wall provided with a removable cover and with a rear wall, a shaft bearing disposed in the rear wall, the side walls of the housing being provided with bearings for a transverse clutch pedal shaft, a bearing support for the clutch pedal shaft attached to one side wall of the housing and a brace for the clutch pedal shaft bearing extending downward and forward and bolted to theiflange' of the housing.

In testimony whereof we hereunto affix our signatures.

ANTHONY M. TEVIS. LOUIS M. SUTTER. 

